I once saw a prototype hollowbody made in Japan for (by?) washburn that looks a lot like that. I might even have a pic. I'll look for it after I get home.
It could be a Bass from Tacoma Guitars. http://www.tacomaguitars.com -> http://www.tacomaguitars.com/artists.htm
Rainey's website has links to Tacoma and Adler; neither has an instrument resembling the one pictured. Nor does Washburn's. Thanks anyway. Anyone else??